Plowshare



wmml

Sept. W, 13.. c. B. JACOBSEN PLOWSHARE Filed June 14, 1934 OLD awn

Patented Sept. 17, 1935 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to the class of agricultural implements and pertains particularly to improvements in plows.

The primary object of the present invention is to provide an improved plow share in which certain features of plow shares of the types now in use are done away with, with resulting increase in the strength of the plow share and an increased efficiency in the operation of the same.

In plows of the type at present in use, the landside on the share is constructed with a pin or slot, or both, in quick detachable shares, and a bolt in bolted shares, for the purpose of holding the share firmly against the frog, but the bolts or pins are so close to the bottom edge of the landside that they soon wear away, causing the share to loosen and spring away from the frog, permitting earth to work in between the frog and the share and, when this occurs, the proper operation of the plow is interfered with.

In the present improved structure, the landside of the share has at its bottom edge, a flange or shoe projecting inwardly beyond the inner face of the landside which holds the share firmly in place against the frog, thus needing no slots, pins or bolts, which tend to weaken landside and the whole point of the share. This shoe increases the wearing capacity of the landside and protects the bottom edge of the frog from wear and prevents the share at all times from springing or spreading away from the frog, consequently not interfering with the proper operation of the plow. The addition of the shoe results in an enlarged point construction which will effectively withstand blows against rocks or other solid objects besides furnishing material for continuous re-sharpening or re-pointing.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming part of this specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing but may be changed or modified so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appended claim.

In the drawing:

Figure 1 illustrates an old type of share, viewing the same from the rear and looking toward the under face or bottom edge of the landside.

Figure 2 illustrates the improved form of share, viewing the under side of the shoe showing its construction and the solid point.

Figure 3 is a view of the under or bottomside of a plow equipped with a share constructed in accordance with the present invention and showing the manner in which the share is mounted in position against the frog. *6

Referring to the drawing wherein like numerals of reference designate corresponding parts throughout the several views, the numeral l indicates in Fig. 1, a share of what will be termed the old style or type, over which the present in- 10 vention constitutes an improvement. This view has been captioned old to distinguish the improved construction therefrom which, in Fig. 2 is shown and captioned new.

In the old style of share, the point is indicated by the numeral 2 and the landside is indicated by the numeral 3, the surface 4 constituting the bottom edge of the landside which is horizontally disposed when the share is in working position and which slides over the earth. In this style of fplow share, a pin opening 5 is formed for the reception of a securing pin 6 welded or riveted into the opening 5, which is supposed to hold the share in position against the frog, but said pin is easily broken or worn off, causing the share to become loose and spread or spring away from the frog.

In the present improved form of plow share, which is illustrated in Fig. 2 and indicated generally by the numeral 6, the landside 1 is increased in width across its lower face to form the broadened shoe surface 8. This results in the formation of a shoulder 9 along the inner face of the landside and also in an increased depth in the bulk or thickness of the point l0.

In Fig. 3, the present improved share is shown in assembled relation with the other parts of a plow structure, wherein the numeral ll indicates the frog on which is fastened the moldboard 12, also the share I! by means of the bolt I3, which at one end is connected with the pin I 4, which is carried by the share and which at the other end is coupled with the frame I5 in the manner illustrated. This bolt 13 tightens and secures the share I! onto the frog 1 I and the frog carries the landside plate 16 which alines with the rear end of the landside portion 1 of the share in the manner illustrated.

It will be apparent from Fig. 3 that the improvement made in the landside portion of the plow share whereby the shoulder 9 results, provides the following features as summed up:

The share will stay firmly and securely in place on the plow during the life of the share.

The share is not weakened by the hole 5 where the pin 6 is welded or riveted in place, as in Fig. 1, but is strengthened by the shoe 8, as in Fig. 2, also the solid point III which will not bend or break so readily when striking rock.

The under edge of the frog is protected by the shoulder and is, therefore, prevented from being worn away.

Furthermore, it will be readily apparent that a plow share constructed in accordance with the present invention constitutes a decided improvement over the old style or type of share for, with this construction, the frog can be more simply built and no holes or slots are needed to retain share in place on frog and this will result in the strengthening of these parts.

If it is a two-piece lay where the landside is welded onto the lay, it will make the weld stronger and more permanent. Also, the landside will not wear out so easily as at present, as it has a wider sliding surface or shoe.

Due to extra material, the point will rarely need re-pointing, as is the case in old style lays,

as in Fig. 1, which generally needs re-pointing when fifty percent worn, at considerable cost to the user. Each time the share is sharpened, the extra material in the point can be drawn from to re-form a new full point.

While it is the usual practice and preferred by the applicant, to construct his plow of steel, it is, of course, to be understood that the invention is not to be limited in this manner but that the same may be constructed of any material which may be found suitable.

What is claimed is:

A plow share having a moldboard piece and a landside formed throughout in one piece which join to form a point, a relatively broad flange running the length of the bottom edge of the landside and projecting inwardly toward the moldboard, said flange flaring inwardly at the end nearest said point and joining the moldboard whereby to provide additional material for use in re-shaping the point.

CHRISTOFFER BERNHARDT JACOBSEN. 

